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Case 4: The Mid-ventricular Short Axis View in a Normal Volunteer (Back to Indications for Cardiovascular MRI)

Double oblique imaging plane: Anterior chest wall on image left, back toward lower right, head toward upper right. See Case 5 for orientation to structures. This view is convenient for qualitative assessment of regional wall motion abnormalities.

Three distinct MRI acquisitions are compared in these three examples. At left, is a conventional, segmented gradient echo cine loop acquired in a 16 heartbeat breathhold (FGRE). In the middle is a hybrid segmented gradient echo cine loop accelerated by short echoplanar readouts (FGRE-ET). At right is the same individual studied using a research pulse sequence called True FISP. The advantages of each method are listed below each image.



case4-1-animation

 

case4-2-animation

 

case4-3-animation

 

FGRE FGRE-ET True FISP
     
Advantages Advantages Advantages
Reliable image quality 2-4x faster than FGRE High signal to noise
Widely available Real-time capable High contrast
Low technical demands    
     
Disadvantages Disadvantages Disadvantages
Requires 10-20s breathholds Requires fast scanner Requires fast scanner
ECG gating Requires careful tuning Motion artifacts common
Arrhythmias a problem Lower Signal to Noise Not widely available
  Not widely available  

 

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